LT3098B - Non-woven fabric for filters - Google Patents

Abstract

Non-woven filtering material applies to the textile industry and is intended to use for in industrial filters. The material consists of two layers strengthened by the way of a filling. One layer is made of ionic fibres, another one of a chemical. Mass ratio of layers is from 100/0 to 70/30. Surface density of the material 290-470 g/m2, thickness 2.3-5.5 mm.

Description

FIELD OF THE INVENTION - The textile industry, specifically non-woven textiles used in industrial filters.

The prior art can be described by a filter nonwoven double layer textile, /; /// jcutibs- = outer layer of polyamide high / summary; / v //-/./ pldoštoi / .X7 ^ ·%) and synthetic polyester fiber (30%), and inner layer of regenerated wool / 10 Fiber, Essential Layers // In the ratio 1: 1-1: 5. General. <=, // substance // mass 200-600 g / m ² (USSR: a. 1. 878833, ONLY ^3. D 04 H 1/42 publ. 1981, no. 41). '' // '// · / /./'.= <;. «' Ίτ // 7 // = 77./ / = / / </ 7 / 7- /.// = //. = <777 //.../7=///-,/,/^^

There is a known non-woven filter material consisting of layers consisting of ionic and non-ionic fibers, and the non-ionic fiber layer consists of viscous, lavender, nitronic or polypropylene fibers. Layer ratio 4-6: 1 .. Both layers (webs) join together by corking. The substance has good filtering properties and is actively absorbed from = air / acidic or alkaline gas and vapor / (hydrochloric, =; chlorine, sulfur tetrachloride, / sulfur oxide, ammonia, etc.) (USSR)

7 /. al 897259, ONLY ³ B 01 D 39/16, publ. 1982. no. 2).

^'25 7/7' / = </ 7/7 << = 7/77 // // ///: // 7 .//77777//77^7//

The closest proposed material is the filter material described in - // - USSR al 581973 (ONLY ² 'B 01 D 39/00, Publ. 1977, no.

), absorbing acid = gas made from cellulosic and synthetic fibers; 75-95% w / w. .-.

/ 30 modified cellulose sulfur ionic surfactant CM-A2, residual content (5-2'5% by weight) - non-ionic / 'fibers, // // viscose rayon, / nitron //, / lavsane, polypropylene .Material density 409 to 749 g / m ² , thickness 6-7, 9 mm, air permeability 86-238 dm ^J / m ² s.

The material // has / good filtration characteristics, it is proposed to make filters, respirators, gas purifying units, acidic. 'to remove harmful impurities from the air. Additions of non-ionic fibers make it possible to reduce cost. The modified anionic / non - ionic fibers are blended in the selected ratio to produce the "liter" material. a web of a certain thickness is formed. The disadvantage of this design filter material is its high surface density. The filter is thick and the cost of raw material increases.

In addition, when using such filters for respirators, there are 7 different types of synthetic fibers 10 ^? 'Tightening of the face causes poor hygiene and may cause respiratory and skin reactions: skin allergies. Since the web is made of fibers / blend, it is technically difficult to ensure an even distribution in the blend, especially when some

157 Relatively small amount of fiber of type 7 used (5-15 //'./'77C'/i/'?:·7/?

Since the fiber CM-A2 is medium. activity anion, which absorbs carbon dioxide gas from the air while reducing sorption power, can work well and for a relatively long time in an environment without chemically active carbon dioxide. since there are only certain types of harmful substances, the possibilities for using these filters in environments contaminated with various constituents of hazardous materials are limited.7 / <1 of the present invention seeks to reduce raw material costs, improve production technology and 'improve 7 product features, liter. material consisting of two layers, one of which consists of ionic fibers and the other of man-made fibers; esapt for a slice ratio of 100: 0 to 70:30. Material 'surface density 290-470 g / m ² , thickness 2.3-5.5 mm _;

The following fibers are used to form webs;

'''- ³ '., .. // .. anionic / cellulose fiber CM ^ Al .3 TS, 65 / 12-5763398-14-90; 3, anionic polyamide-fiber KM ^ AP - TS 40> 5. / / 461-806-07-85; 5 '// 5 ^; 'i7

Viscose fiber - TS 6x09; '. <7./7//35 Polyamide ^? - TS 6-06-S-13-76. 7th

5/35 ^ // 53/3/73 ././ 35/57

The proposed filter material purifies the air by absorbing the acidic toxic gas (HF, SiF / vaporized welding apparatus, aerosol solids, solids.) .The filter material is insoluble in water, and non-flammable.

With the use of jet fibers ..KM-Al or CM-A1 fibers, 3) e.g. CM-A2,5 elongated: · ionic layer.

'20 lifetime because the CM-A1 is cheaper than the CM-A2 (made from CM-A1) and, being less active, can work not only in inert, filled with some kind of toxic two, .. 5 composition gases and aerosols. The structure of the filter material is such that it can be regenerated in a strong alkaline regenerator in the environment to be cleaned. anionic polyamide KM-A1 or anionic cellulosic CM-A1 fibers., An "example having both layers of CM-1" was also produced. One of .

for the more important requirements for the design of a liter of material, not less than 1.6 mg eq / g static activity volume. To this end, and by reducing the cost of the product.

: / .7 ^{4 the} minimum thickness of the anion onitic layer is chosen according to the Shilov sorption dynamics equation (CePnyHOBa EK ilpOMbnuAeHHaa aACOP0ųnn ra3OB m napoB. M .: Bbiciuafl tuxoAa45,.

⁷ Ϊ969). 'b- / 7d / 7bd7 / d': 7 / ') / 7: <' 7.-7 .- /.

According to the Shilov equation, the layer used may not be thinner than 2 mm while using

I O

KM-A1, not thinner than 1.8 mm. A layer of viscose fiber attached to the face or body; no

- thicker than 30% of the total filter thickness. When using the first layer of polyamide fiber, the surface of the filter that comes in contact with the face or body is calendered and therefore better repels dust. This

;. · ...: -. · '1.

the layer should be no less than 10% of the total filter thickness since, when calendering,. the fibers are melted, the layer becomes very thin and can pass dust.

The sheets are manufactured by the industrial non-woven cork technology line AHH-182. The unit is supplied with two separate layers of defined composition and joined together by capping, 100 + 5. cm ' ¹ density. When using the first layer of polyamide fiber to reduce its roughness and improve performance, the fliter material is calibrated to T = 180 ± 5 ^Q C, p? = 5 atm. The physical-mechanical parameters were determined according to the following procedures:

. sample selection / GOST 13587 ^ 77 ·.

/ linear dimensions,;

surface density 'd' · 'db :: ®3ST {: 155Q-2: .l.-80.

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: '·' Thickness mass non-uniformity 5 - breaking force and continuous air permeability 'static activity volume

- GOST 12023-66 (2KPa compression)

- GOST 15902.2-79

- GOST 15902.3-79

- GOST 12088-77

- GOST 20255.1-84.

The characteristics of the filter materials produced 10 were compared with those of the known. technical solution (USSR · a. 1.

581973) -indicators and are shown in the table, vol

... vis - viscose fiber, PA - polyamide fiber.

A patented and comparative analysis of known technical solutions shows that reducing the surface density of a liter of material by 1.4 to 1.5 times its thickness by up to 3 times the required »at least 1.6 mg ·. eq / g static activity volume, its air permeability improves (decreases) by up to 4 times. . - / -. .

Patentable Solution - Non-Woven Blanket - For All - Ready for batch production, available equipment, raw materials, conducted / production tests, and evaluated test sample quality - and

- performance.

Claims (1)

DEFINITION OF INVENTION Non-woven. two layer filter material. characterized by corking 5 'in that one layer is made of ion-exchange / bundle and a second of the fibers in layer ratios of from 100: 0 to 70: 30, - the material surface density of 290-470 g / m ² and thickness of 2.3 to 5, 5 mm.